I can understand the OP's thinking, although I have Lenovo's Yoga 2 Pro.
With my laptop in my lap, I typically have to be leaning back to comfortably use the keyboard. Sitting up or slightly leaning forward, it's more comfortable to grasp and scroll with the screen itself, maybe bent a little further back than typical usage. It's a more comfortable resting position.
Although sometimes I just flip my yoga into a tablet and that's just swell
Many times touch is more convenient than the trackpad especially when I am feeling lazy. I am reading this thread on a Y2P, lying on my side, laptop on the bed, one hand supporting my head and the other scrolling the page on the screen. Much easier than any other method.
With my laptop in my lap, I typically have to be leaning back to comfortably use the keyboard. Sitting up or slightly leaning forward, it's more comfortable to grasp and scroll with the screen itself, maybe bent a little further back than typical usage. It's a more comfortable resting position.
Although sometimes I just flip my yoga into a tablet and that's just swell